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Mitsubishi Electronics PCA-A24GA manual

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  • Page 1

    SER VICE MANUAL SPLIT -TYPE, HEA T PUMP AIR CONDITIONERS SPLIT -TYPE, AIR CONDITIONERS No. OC368 REVISED EDITION-B INDOOR UNIT REMOTE CONTROLLER CONTENTS 1. TECHNICAL CHANGES ··································2 2 . REFERENCE MANUAL ······································2 3. SAF[...]

  • Page 2

    2 1 TECHNICAL CHANGES 2 REFERENCE MANUAL Service Ref. PUZ-A18/24/30/36/42NHA PUZ-A18/24/30/36/42NHA-BS PUY -A12/18/24/30/36/42NHA (1) PUY -A12/18/24/30/36/42NHA (1) -BS Service Manual No. OC367 2-1. OUTDOOR UNIT SERVICE MANUAL Series (Outdoor unit) PUZ-A·NHA PUZ-A·NHA-BS PUY -A·NHA PUY -A·NHA-BS Manual No. OCS04 2-2. TECHNICAL DA T A BOOK PCA-A[...]

  • Page 3

    3 Cautions for units utilising refrigerant R410A 3-2. CAUTIONS RELA TED TO NEW REFRIGERANT Use new refrigerant pipes. Make sure that the inside and outside of refrige- rant piping is clean and it has no contamination such as sulfur hazardous for use, oxides, dirt, shaving particles, etc. In addition, use pipes with specified thickness. Store the pi[...]

  • Page 4

    4 Gravimeter Unit [3] Service tools Use the below service tools as exclusive tools for R410A refrigerant. No. Specifications 1 Gauge manifold ·Only for R410A ·Use the existing fitting specifications . (UNF1/2) ·Use high-tension side pressure of 5.3MPa·G or over . 2 Charge hose ·Only for R410A ·Use pressure performance of 5.09MPa·G or over . [...]

  • Page 5

    5 P ART NAMES AND FUNCTIONS 4 ● Indoor Unit Air outlet Intake grille Air intake Left/right guide vanes Change the direction of airflow from the horizontal blower. Long-life filter Removes dust and foreign matter from air coming in through the grille (Recommended cleaning interval : Approx. every 2,500 operating hours) Up/down guide vanes Change t[...]

  • Page 6

    6 ● Wired remote controller ● ● ˚F˚C ˚F˚C ERROR CODE AFTER TIMER TIME SUN MON TUE WED THU FRI SA T ON OFF Hr AFTER FIL TER FUNCTION ONL Y1Hr . WEEKL Y SIMPLE AUTO OFF Note: “PLEASE W AIT” message This message is displayed for approximately 3 minutes when power is supplied to the indoor unit or when the unit is recovering from a power [...]

  • Page 7

    7 ON/OFF TEMP FAN VANE TEST RUN AUTO STOP AUTO START h min LOUVER MODE CHECK RESET SET CLOCK MODEL SELECT NOT AVAILABLE SWING CHECK FAN TEST RUN ˚F ˚C AMPM STOP START AMPM COOL DRY AUTO FAN HEAT V ANE CONTROL button Changes the air flow direction. CLOCK button RESET button SET button ON/OFF button The unit is turned ON and OFF alternately each ti[...]

  • Page 8

    8 SPECIFICA TIONS 5 A A kW F.L.A m 3 /min(CFM) Pa(mmAq) dB mm(in.) mm(in.) mm(in.) mm(in.) kg(lbs) Service Ref. Power supply(phase, cycle, voltage) Max. Fuse Size Min.Circuit Ampacity External finish Heat exchanger Fan Fan(drive) o No. Fan motor output Fan motor Airflow(Low-Medium2-Medium1-High) External static pressure Operation control & Ther[...]

  • Page 9

    9 NOISE CRITERION CUR VES 6 90 80 70 60 50 40 30 20 10 63 125 250 500 1000 2000 4000 8000 APPROXIMA TE THRESHOLD OF HEARING FOR CONTINUOUS NOISE NC-60 NC-50 NC-40 NC-30 NC-20 NC-70 BAND CENTER FREQUENCIES, Hz OCT A VE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µ bar) PCA-A24GA PCA-A30GA PCA-A24GA 1 PCA-A30GA 1 NOTCH High Medium1 Medium2 Low SPL([...]

  • Page 10

    10 7 OUTLINES AND DIMENSIONS PCA-A24GA PCA-A24GA 1 PCA-A30GA PCA-A30GA 1 9 11-13/16(300) 3-15/16(100) 2-1/8(54) 2-1/4(57) 7/16(11) 9 Knockout hole for fresh air intake (6~7) 1/4~9/32 1-21/32(42) 7-1/16(179) 1-1/4(32) 6-11/32(161) 20-21/32(525) 1-1/2(38) 3-1/8(79) 10-3/8(263) 6-3/4(171) 5-7/16(138) 3-3/8(86) 6-7/8 (175) 1-13/16(46) 5-5/32(131) 1/16([...]

  • Page 11

    11 PCA-A36GA PCA-A36GA 1 PCA-A42GA PCA-A42GA 1 Unit : inch(mm) 4 Gas pipe MODEL 3/8F 5/8F 5 Liquid pipe 36/42 7/16(11) 9 2-3/16(55) 5-7/8(150) 13(330) 7-7/8(200) 9 Knockout hole for fresh air intake (6~7) 7-2/32(289) 1-21/32(42) Electrical box (160) 1/4~9/32 3-21/32(93) 6-5/16 1-1/2(38) 1-1/2(38) 5-1/2(140) (196) 1/16(1) 9-9/32(236) 7-9/16 1-25/32([...]

  • Page 12

    12 PCA-A24GA PCA-A30GA PCA-A36GA PCA-A42GA PCA-A24GA 1 PCA-A30GA 1 PCA-A36GA 1 PCA-A42GA 1 [Emergency operation procedure] When the wired remote control or the indoor unit microcomputer has failed, but all other components work properly, if you set the switch (SWE) on the indoor control board ON, the indoor unit will begin Emergency Operation. When[...]

  • Page 13

    13 PCA-A24GA PCA-A30GA PCA-A36GA PCA-A42GA PCA-A24GA 1 PCA-A30GA 1 PCA-A36GA 1 PCA-A42GA 1 Pipe temperature thermistor/liquid (TH2) Distributor with strainer #50 Condenser/evaporator temperature thermistor (TH5) Room temperature thermistor (TH1) Refrigerant flow in cooling Refrigerant flow in heating Strainer #50 Strainer #50 Heat exchanger Refrige[...]

  • Page 14

    14 10 TROUBLESHOOTING <Error code display by self-diagnosis and actions to be taken for service (summary)> Present and past error codes are logged and displayed on the wired remote controller or controller board of outdoor unit. Actions to be taken for service and the inferior phenomenon reoccurrence at field are summarized in the table below[...]

  • Page 15

    15 Error Code Abnormal point and detection method Cause Countermeasure P1 Room temperature thermistor (TH1) 1 The unit is in 3-minute resume preven- tion mode if short/open of thermistor is detected. Abnormal if the unit does not reset normally after 3 minutes. (The unit returns to normal operation, if it has been reset normally .) 2 Constantly det[...]

  • Page 16

    16 Error Code Abnormal point and detection method Cause Countermeasure P6 Freezing/overheating protection is working 1 Freezing protection (Cooling mode) The unit is in 6-minute resume prevention mode if pipe <liquid or condenser/evap- orator> temperature stays under -15 : (5˚F) for 3 minutes, 3 minutes after the compressor started. Abnormal[...]

  • Page 17

    17 Error Code Abnormal point and detection method Cause Countermeasure P9 Pipe temperature thermistor / Condenser-Evaporator (TH5) 1 The unit is in 3-minute resume protec- tion mode if short/open of thermistor is detected. Abnormal if the unit does not get back to normal within 3 minutes. (The unit returns to normal operation, if it has been reset [...]

  • Page 18

    18 E6 1 Contact failure, short circuit or , miswiring (converse wiring) of indoor/outdoor unit connecting wire 2 Defective transmitting receiving circuit of indoor controller board 3 Defective transmitting receiving circuit of indoor controller board 4 Noise has entered into indoor/ outdoor unit connecting wire. ∗ Check LED display on the outdoor[...]

  • Page 19

    19 (For the separate indoor/outdoor unit power sup- ply system) 1 Power supply of 208/230V AC is not supplied to indoor unit. 2 The connectors of the optional replacement kit are not used. 3 Defective indoor controller board 4 Defective indoor power board 10-3. TROUBLESHOOTING BY INFERIOR PHENOMENA Note: Refer to the manual of outdoor unit for the [...]

  • Page 20

    20 Note: Refer to the manual of the outdoor unit for the detail of remote controller . (3)Upward/downward vane performance failure 1 The vane is not downward during defrosting and heat preparation and when the thermostat is OFF in HEA T mode. (Working of COOL protection function) 2 V ane motor does not rotate. • Defective vane motor • Breaking [...]

  • Page 21

    21 10-4. WHEN WIRED REMOTE CONTROLLER OR INDOOR UNIT MICROCOMPUTER TROUBLES 1. If there is not any other problem when trouble occurs, emergency operation starts as the indoor controller board switch (SWE) is set to ON. During the emergency operation the indoor unit operates with Indoor fan at high speed. 2. For emergency operation of cooling or hea[...]

  • Page 22

    22 10-5. HOW TO CHECK THE P ARTS PCA-A24GA PCA-A30GA PCA-A36GA PCA-A42GA PCA-A24GA 1 PCA-A30GA 1 PCA-A36GA 1 PCA-A42GA 1 1 1 2 2 3 3 Red White Black Relay connector Protector 4 5 2 361 Orange Red Pink Y ellow Brown Blue M 4 2 5 31 Pink Orange Red Y ellow Blue M OFF : 130 i 5 : ON : 80 i 20 : Parts name Check points Disconnect the connector then mea[...]

  • Page 23

    23 0 10 20 30 40 50 -20 -10 0 10 20 30 40 50 < Thermistor for lower temperature > T emperature Resistance (k " ) : -4 -14 32 50 68 86 104 122 ˚F 10-6.TEST POINT DIAGRAM 10-6-1. Power board PCA-A24GA PCA-A30GA PCA-A36GA PCA-A42GA PCA-A24GA 1 PCA-A30GA 1 PCA-A36GA 1 PCA-A42GA 1 CNSK Connect to the indoor controller board (CNDK) Between 1 [...]

  • Page 24

    24 10-6-2. Indoor controller board PCA-A24GA PCA-A30GA PCA-A36GA PCA-A42GA PCA-A24GA 1 PCA-A30GA 1 PCA-A36GA 1 PCA-A42GA 1 CN2D Connect to the indoor power board (CN2S) (12.5~13.7V DC) CNDK Connect to the indoor power board (CNSK) (208/230V AC) FUSE (6.3 A 250 V) CN22 Connect to the terminal block(TB5) (Remote controller connecting wire) (10.4~14.6[...]

  • Page 25

    25 SW1 Setting by the dip switch and jumper wire Functions Jumper wire Model settings Capacity settings Pair number setting with wireless remote controller For service board Remarks SW2 J41 J42 Unit type setting JP1 Indoor controller board type setting JP3 0 1 2 3 ~ 9 Wireless remote controller setting Control PCB setting J41 J42 <Initial settin[...]

  • Page 26

    26 DISASSEMBL Y PROCEDURE 11 1. Removing the air intake grille (1) Slide the intake grille holding 2 knobs backward to open the intake grille. (2) When the intake grille left open, push the stoppers on the rear 2 hinges to pull out the intake grille. OPERA TING PROCEDURE PHOTOS & ILLUSTRA TIONS 2. Removing the electrical box (1) Remove the air [...]

  • Page 27

    screw side panel sliding the panel to the front 27 Figure 3 5. Removing the side panel (1) Remove the air intake grille. (2) Remove the screw from the side panel, and remove the side panel by sliding the panel to the front. OPERA TING PROCEDURE PHOTOS & ILLUSTRA TIONS 3. Removing the fan motor <MF> (1) Remove the intake grille. (2) Discon[...]

  • Page 28

    28 OPERA TING PROCEDURE PHOTOS 6. Removing the vane motor <MV> (1) Remove the air intake grille. (See the figure 1) (2) Remove the left side panel. (See the figure 3) (3) Remove the relay connector of vane motor . (4) Remove the electrical box. (5) Remove the screws of vane motor , then remove vane motor <MV>. (Note) Connect the lead wi[...]

  • Page 29

    29 OPERA TING PROCEDURE PHOTOS 9. Removing the drain pan (1) Remove the air intake grille. (See the figure 1) (2) Remove the beam. (3) Remove the side panels of right and left. (See the figure 3) (4) Remove the under panel. Remove the screws of the right and left side drain pan. (5) Remove the 2 insulations in centre of the drain pan, and after rem[...]

  • Page 30

    30 OPERA TING PROCEDURE PHOTOS 12. Removing the heat exchanger (1) Remove the air intake grille. (See the figure 1) (2) Remove the beam. (3) Remove the side panel (right and left). (See the figure 3) (4) Disconnect the relay connector of the pipe thermistor . (5) Remove the under panel. (See the photo 7) (6) Remove the drain pan. (See the photo 8) [...]

  • Page 31

    31 P ARTS LIST (non-RoHS compliant) 12 No. Parts No. Parts Name Specifications Wiring Diagram Symbol Recom- mended Q'ty 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 1 1 1 1 2 1 1 1 1 1 1 3 1 1 1 1 MF MF TH1 TH2 TH5 D09C4P70MS D10C4P90MS Remarks (Drawing No.) R01 29J 130 R01 35J 130 R01 43E 126 T7W 30J 762 T7W E14 762 R01 700 116 R01 E17 114 R01 E19 [...]

  • Page 32

    32 STRUCTURAL P ART PCA-A24GA PCA-A30GA PCA-A36GA PCA-A42GA No. Parts No. Parts Name Specifications 24/30 Wiring Diagram Symbol Recom- mended Q'ty PCA-A GA 1 1 1 1 4 4 2 2 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 1 1 1 36/42 1 1 1 1 4 4 2 2 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 1 1 1 MV MV Remarks (Drawing No.) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 [...]

  • Page 33

    33 T7W E18 255 T7W E19 255 T7W E56 310 T7W E41 716 R01 E18 246 R01 E21 246 T7W E35 313 T7W A01 305 T7W E14 713 CAPACITOR CAPACITOR INDOOR CONTROLLER BOARD TERMINAL BLOCK TERMINAL BLOCK TERMINAL BLOCK POWER BOARD REMOTE CONTROLLER CORD REMOTE CONTROLLER 4 = 440V 5 = 440V 3P(L1,L2,GR) 3P(S1,S2,S3) 2P(1,2) PAR-21MAA 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 C C[...]

  • Page 34

    34 13 RoHS P ARTS LIST No. Parts No. Parts Name Specifications Wiring Diagram Symbol Recom- mended Q'ty 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 RoHS G G G G G G G G G G G G G G G G G G G G G G G G 1 1 1 1 2 1 1 1 1 1 1 3 1 1 1 1 MF MF TH1 TH2 TH5 D09C4P70MS D10C4P90MS Remarks (Drawing No.) R01 30J 130 R01 32J 130 R01 45E 126 T7W 40J 762 T7W E31[...]

  • Page 35

    35 STRUCTURAL P ART PCA-A24GA 1 PCA-A30GA 1 PCA-A36GA 1 PCA-A42GA 1 No. Parts No. Parts Name Specifications 24/30 Wiring Diagram Symbol Recom- mended Q'ty PCA-A GA 1 1 1 1 1 4 4 2 2 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 1 1 1 36/42 1 1 1 1 4 4 2 2 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 1 1 1 Remarks (Drawing No.) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19[...]

  • Page 36

    HEAD OFFICE : TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAP AN C Copyright 2006 MITSUBISHI ELECTRIC ENGINEERING CO., L TD. Distributed in Jun. 2007 No.OC368 REVISED EDITION-B PDF 9 Distributed in Aug. 2006 No.OC368 REVISED EDITION-A PDF 9 Distributed in Feb. 2006 No.OC368 PDF 10 Made in Japan New publication, effective Jun. 2007 S[...]